hi Ben i heard you wanted suggestions and i wanted to suggest a portable cinema maybe. so you could have maybe one of those Samsung projects (the mini one that are portable) to connect to you phone to watch movies on the wall and maybe built in sound and a dvd player you could include a hdmi but i guess would only come with a certain projector and you could try a external battery supply. i love your videos there really inspiring im only 13 at the moment im messing with my pi and doing the festival of code in England but i hope you like my idea.
hope you have fun building it and i'll look on youtube for the build
if you do call becarful we might pick up the phone and put it down
keep the good work up
from Alex@
